// Copyright (c) 1996-99 The Regents of the University of California. All
// Rights Reserved. Permission to use, copy, modify, and distribute this
// software and its documentation without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph appear in all copies.  This software program and
// documentation are copyrighted by The Regents of the University of
// California. The software program and documentation are supplied "AS
// IS", without any accompanying services from The Regents. The Regents
// does not warrant that the operation of the program will be
// uninterrupted or error-free. The end-user understands that the program
// was developed for research purposes and is advised not to rely
// exclusively on the program for any reason.  IN NO EVENT SHALL THE
// UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
// SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
// ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
// THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
// PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
// CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT,
// UPDATES, ENHANCEMENTS, OR MODIFICATIONS.




// File: SamplePort2.java
// Classes: SamplePort2
// Original Author: ics125b spring 1996
// $Id: SamplePort2.java,v 1.3 2004/01/30 02:00:43 bobtarling Exp $

package org.tigris.gef.demo;

import java.awt.*;
import java.util.Vector;
import java.io.*;

import org.tigris.gef.graph.*;
import org.tigris.gef.graph.presentation.*;

/** An example subclass of NetPort for the BasicApplication application. */

public class SamplePort2 extends SamplePort implements Serializable {

	/** Construct a new SamplePort2 as a port of the given NetNode. This
	 * example includes the constraint that SamplePort2's can only be
	 * part of SampleNode's. */
	public SamplePort2(NetNode parent) {
		super(parent);
		if (!(parent instanceof SampleNode)) {
			// throw an exception
			System.out.println("SamplePort2s are only to be used on SampleNodes");
		}
	}

	protected Class defaultEdgeClass(NetPort otherPort) {
		try {
			return Class.forName("org.tigris.gef.demo.SampleEdge2");
		} catch (java.lang.ClassNotFoundException ignore) {
			return null;
		}
	}


	/** Add the constraint that SamplePort2's can only be connected to
	 * other ports of the same type. */
	public boolean canConnectTo(GraphModel gm, Object anotherPort) {
		return (super.canConnectTo(gm, anotherPort)) &&
		(anotherPort.getClass() == this.getClass());
		// needs-more-work: should work with subclasses too. This is
		// really a java.lang.Class method that is missing: isSubclass()
	}
} /* end class SamplePort2 */
